2014/10/15 下午 10:14:03

iphone Programming Glossary: sha

iPhone/OS X LION: How to retrieve the decoded data from the CC_SHA256 encrypted data?

http://stackoverflow.com/questions/10174536/iphone-os-x-lion-how-to-retrieve-the-decoded-data-from-the-cc-sha256-encrypted

OS X LION How to retrieve the decoded data from the CC_SHA256 encrypted data I am encoding NSString input using the following code CC_SHA256 . Could someone help me retrieving in.. retrieve the decoded data from the CC_SHA256 encrypted data I am encoding NSString input using the following code CC_SHA256 . Could someone help me retrieving in decoded format using the same logic NSString encodeAndGetHashInfo NSString inStringToHashIt.. inStringToHashIt STATIC_HASH NSLog @ withSalt. @ withSalt NSString inputStr withSalt unsigned char hashedChars 32 CC_SHA256 inputStr UTF8String inputStr lengthOfBytesUsingEncoding NSUTF8StringEncoding hashedChars NSData hashedData NSData dataWithBytes..

Decode sha1 string to normal string

http://stackoverflow.com/questions/3492317/decode-sha1-string-to-normal-string

NSASCIIStringEncoding NSData keyData NSData dataWithBytes s length strlen s This is the destination uint8_t digest CC_SHA1_DIGEST_LENGTH 0 This one function does an unkeyed SHA1 hash of your hash data CC_SHA1 keyData.bytes keyData.length digest.. s length strlen s This is the destination uint8_t digest CC_SHA1_DIGEST_LENGTH 0 This one function does an unkeyed SHA1 hash of your hash data CC_SHA1 keyData.bytes keyData.length digest Now convert to NSData structure to make it usable again.. destination uint8_t digest CC_SHA1_DIGEST_LENGTH 0 This one function does an unkeyed SHA1 hash of your hash data CC_SHA1 keyData.bytes keyData.length digest Now convert to NSData structure to make it usable again NSData out NSData dataWithBytes..

Is there a library for iPhone to work with HMAC-SHA-1 encoding

http://stackoverflow.com/questions/476455/is-there-a-library-for-iphone-to-work-with-hmac-sha-1-encoding

there a library for iPhone to work with HMAC SHA 1 encoding For all operation with Amazon services S3 EC2 SimpleDB You need to sign all resquest with HMAC SHA 1 Signature.. HMAC SHA 1 encoding For all operation with Amazon services S3 EC2 SimpleDB You need to sign all resquest with HMAC SHA 1 Signature http en.wikipedia.org wiki HMAC http docs.amazonwebservices.com AWSFWS latest DeveloperGuide index.html SummaryOfAuthentication.html.. and there is no problems. Problem is in the iPhone application. iPhone developer says that there is no way to use HMAC SHA 1 encoding and he have no rigths to implement his own algorithm. As programmer I cannot understand why there can be a problem...

What is the difference between the different padding types on iOS?

http://stackoverflow.com/questions/5054036/what-is-the-difference-between-the-different-padding-types-on-ios

the following padding types kSecPaddingNone kSecPaddingPKCS1 kSecPaddingPKCS1MD2 kSecPaddingPKCS1MD5 kSecPaddingPKCS1SHA1 A user on the Apple CDSA mailing list says that kSecPaddingPKCS1 ... is the same as PKCS #1 1.5 . The Certificate Key and.. Is kSecPaddingPKCS1 just the raw padding of the underlying RSA operation according to RFC 3447 When signing a SHA 256 SHA 384 or SHA 512 digest with SecKeyRawSign does a developer need to use kSecPaddingPKCS1 and perform the ASN.1 padding.. Is kSecPaddingPKCS1 just the raw padding of the underlying RSA operation according to RFC 3447 When signing a SHA 256 SHA 384 or SHA 512 digest with SecKeyRawSign does a developer need to use kSecPaddingPKCS1 and perform the ASN.1 padding herself..

iPhone and HMAC-SHA-1 encoding

http://stackoverflow.com/questions/735714/iphone-and-hmac-sha-1-encoding

and HMAC SHA 1 encoding im trying to get a call to amazon web service and im stuck on getting the signature looked at this but i still.. clearTextData what do i need to pass for these two values inputs NSData keyData NSData clearTextData uint8_t digest CC_SHA1_DIGEST_LENGTH 0 CCHmacContext hmacContext CCHmacInit hmacContext kCCHmacAlgSHA1 keyData.bytes keyData.length CCHmacUpdate.. NSData clearTextData uint8_t digest CC_SHA1_DIGEST_LENGTH 0 CCHmacContext hmacContext CCHmacInit hmacContext kCCHmacAlgSHA1 keyData.bytes keyData.length CCHmacUpdate hmacContext clearTextData.bytes clearTextData.length CCHmacFinal hmacContext..

Generating cryptographically secure authentication tokens

http://stackoverflow.com/questions/840537/generating-cryptographically-secure-authentication-tokens

are the best practices for generating this sort of token to be used for authentication For example we could... Hash SHA 256 etc a random string and store it in the database for the given user along with an expiration date. Do a simple lookup..